Success project Gotthard base tunnel

On 1st June, 2016, the Gotthard base tunnel was opened with due ceremony as the longest rail tunnel worldwide.

Each day more than 200 trains pass this tunnel with a speed of more than 250 km/h. Safety in the tunnel is a major issue. Every 300 metres there are cross-galleries in the tunnel to allow passengers to flee into the other tube in case of fire.

Fire protection in the tunnel is provided by a Siemens solution: it combines a linear thermal alarm system, thermal imaging camera and smoke detectors.

We are proud to have contributed an important part in this significant project. For this Siemens solution we provided 30 FireGuard smoke detectors which were installed at each of the subterranean train stations Sedrun and Faido. The sensor detects beginning fires already at an early stage (cold smoke) and thus reacts faster than fire alarm cables. Our instruments are protected from the harsh tunnel conditions by means of cages – which are a custom-made design for the Gotthard base tunnel.

FireGuard 2

The FireGuard detects emerging fires already at their early stages (cold smoke). The sensor uses the available natural air stream in the tunnel. Any influence caused by fog will be eliminated by optional heating elements. The sensor is very compact and has neither movable parts nor wear parts nor does it need consumables. As a light source, an economical LED is used. An adjustable bracket allows mounting at the wall, in the arched section or at the ceiling. Special models for installation in the intermediate ceiling or directly in the ventilation dampers are available. Various ways of connections allow a flexible system integration. Individual setting of parameters allows an optimal object and location related setting of alarms, there are no false alarms.
Maintenance is limited to occasional cleaning and the automatic adjustment with a control rod. Soiling monitoring provides information on the state of the instrument. Maintenance is only necessary when required, from experience only about every 5 years, and the time required per instrument is normally between 15 and 25 minutes at the most.

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